Sheet metal form and sheet metal lath



Aug. 16, 1932. T. J. FRABER 1,871,976

SHEET METAL FORM AND SHEET METAL LATH Filed June 25, 1950 2 Shets-S'neet 1 Aug. 16, 1932. T. J. FRABER SHEET METAL FORM AND SHEET METAL LATH Filed June 23, 1930 2 Sheets-Sheet 2 Zlwwntoac Patented Aug. 16, 1932 UNETED STATES THOMAS J'. FRABER, OF WASHINGTON, DISTRIGT OF COLUMBIA V SHEET METAL FORM AND SHEET METAL LATE Application filed June 23,

The invention relates to the construction of concrete floors to produce a monolithic formation of beams, joists and the floor slab, and metal lath ceiling.

he present improvement involves the elimination of hangers, channel iron furring, and the tying of suspended metal lath ceiling.

Similar numerals refer to similar parts throughout the drawings. However, in all of its application certain primary features are present.

With the above and other objects in view as will be hereinafter apparent, the invention consists in general of certain novel details of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings and specifically claimed.

In the drawings Figure 1 is a perspective view taken from one end of a form constructed in accordance with this invention.

Figure 2 is an enlarged section on the line 22 of Figure 1.

Figure 3 is a detail perspective view taken from the opposite end to Figure 1 and showing an end closure in position.

Figure 4 is a perspective view of the end closure removed from the form.

Figure 5 is a cross-section through a portion of a building showing the forms in use.

Figure 6 is a view similar to Figure 5 but taken at right angles thereto.

Figure 7 is a bottom plan of a ceiling constructed with these forms, a portion of the ceiling plastering being broken away to show the forms.

In the embodiment of the invention here shown it will be seen that the form has a body portion made from a single sheet of metal bent to provide top portions 10, side walls 11 and bottom portions 12. The top portions 10 are connected along the longitudinal center line of the top by an inwardly extending V-shaped rib l3 and are inclined downwardly from the upper edges of the V- shaped rib to the upper edges of the side walls. This rib thus forms a V-shaped trough for the reception of the cementitious 1930. Serial No. 453,166.

material when the latter is poured. The top. sides and bottom portions are provided with transversely extending struck-in ribs 14 tapered attheir ends and spaced from each other longitudinally 'of the device. These ribs form stiffening means for the form so that a light gage metal may be used while the form will be free from danger of collapse under the conditions of use. their ends tapered as shown. 7 Y e The bottom portions 12 have their edges These ribs have united by an upstanding seam 15. which eX- I tends centrally of the width of the form from end to end thereof and stifiens the bot. tom ofithe form longitudinally. Also the bottom portion of he form is provided with a multiplicity of erforations 1 6 through which a portion of the ceiling plaster may pass to key the ceiling to the forms.

At one end each form has inwardly bent I flanges 17 while the other end is preferably left'plainv so that the ears 18 of an end closure 19 may fit therein, the closure itself fitting against this end and the ears support ing it by their frictional engagement with the inside of the form. -These closures are used at the ends of formswhich are intended to butt against concrete beam portions of the complete floor, to form pockets for lighting fixtures between two forms and the like.

In utilizing the invention false work consisting of posts or struts 20 and the side plates 21 of beam molds are erected in the usual manner. Form supporting strips 22 are laid from one beam mold to another and on the edges ofthese strips are supported the forms just described. From Figure 5 it will be seen that these forms are laterally spaced.

oncrete is now poured and forms a monolithic structure since it flows down into the beam molds through the spaces between the closed ends of adjacent molds to make the deep beam 23 of Figure 6 and between the spaced mold sides to make the purlins 24 of Figure 5. The floor 25 rests, of course, on top of the forms. 7 As the concrete is poured it enters the recesses or pockets formed by the pressed in ribs 14: and keys the forms firmly in place. After the concrete has set and the false work is re:

in the usual manner moved the under side of the structure will be as shown in Figure 7 so that the plaster 26 may be applied and keys firmly thereto.

It is obvious that changes may be made in the form and construction of the invention without departing from the material principles thereof. I do not therefore desire to con fine the invention to the exact form herein shown and described but I do desire to include all such as properly come within the scope claimed.

I claim:

1. A sheet metal form r'or monolithic floors comprising a tubular member having a top, bottom and side walls, said top wall having an inwardly extending V-shaped rib running longitudinally from end to end centrally of its width and having inwardly ressed transversely extending ribs at each side of the longitudinal rib, said side walls having inwardly pressed cesses for the reception of concrete to key the forms in place, said bottom wall being provided with means to engage and hold plaster.

ribs forming re- 2. A sheet metal form for monolithic floors 7 comprising a tubular member having a top, bottom and side walls, said top wall having an inwardly extending V-shaped rib running longitudinally from end to end centrally of its width and having inwardly pressed transversely extending ribs at each side of the longitudinal rib, said side walls having inwardly pressed ribs forming recesses for the reception of concrete to key the forms in place, said bottom wall having an inwardly extending upstanding rib running longitudinally from end to end centrally of its width, said bottom wall further being provided with a multiplicity of openings forming plaster key means.

. THOMAS J FRABER. 

